A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Green infrastructure cooling strategies for urban heat island mitigation in cities : case study of Glasgow city centre
Synergy of the warming produced by the Urban Heat Island (UHI) effect and current climate trends is likely to affect the thermal environment of the cities. Urban green infrastructure (UGI) has been promoted as a key strategy for heat stress mitigation. While literature provides insights into viable UHI mitigation strategies, UGI is rarely utilized with UHI mitigation purpose in city planning. There is a lack of comparable information on the effectiveness of different UGI strategies and case studies from city retrofitting projects that could provide guidance. This poses significant challenges for urban planners and decision-makers, who need to prioritize target areas and select most effective solutions under spatial and financial constraints. Given research investigates the UHI patterns in the context of Glasgow city (Scotland, UK) across three spatial scales, explores scale-dependent interactions between the UHI distribution and UGI, and, finally, evaluates the UHI mitigation potential of the Glasgow Avenues Programme, a city centre retrofitting strategy currently implemented by the Glasgow City Council. Based on microclimate simulations, the effectiveness of suggested greening schemes and alternative greening strategies of different UGI types, e.g., trees, grass and shrubs, green roofs, are analysed. The results show that, in Glasgow, the UHI phenomenon is most pronounced in summer and demonstrates a highly clustered pattern in the inner urban areas. At present state, on hot summer day pedestrians are likely to experience strong to extreme heat stress, which requires mitigation. UGI is a key factor of lowering surface temperatures in 75% of Glasgow city data zones, though UGI has more impact on urban heat at the larger scale, while at finer - cooling effect is weaker. Simulations demonstrate that greening scheme proposed by the Glasgow City Council Avenues Programme can mitigate local air temperatures by 0.91 K and improve pedestrian thermal comfort. Therefore, the Avenues Programme can be considered as an effective UHI mitigation case study and climate adaptation strategy. Once implemented on the full scale, the UGI can counterbalance the warming expected by 2050 due to the climate change. However, cooling effect of the Avenues Programme can be further maximized by strategical placement of trees and revision of the selected tree species. Findings of this study contribute to existing knowledge on UHI in temperate climate and provide empirical evidence on cooling potential of different UGI types that can be used to develop targeted, scale-specific cooling interventions, as well as to inform and refine current guidance to achieve urban climate adaptation goals.
Green infrastructure cooling strategies for urban heat island mitigation in cities : case study of Glasgow city centre
Synergy of the warming produced by the Urban Heat Island (UHI) effect and current climate trends is likely to affect the thermal environment of the cities. Urban green infrastructure (UGI) has been promoted as a key strategy for heat stress mitigation. While literature provides insights into viable UHI mitigation strategies, UGI is rarely utilized with UHI mitigation purpose in city planning. There is a lack of comparable information on the effectiveness of different UGI strategies and case studies from city retrofitting projects that could provide guidance. This poses significant challenges for urban planners and decision-makers, who need to prioritize target areas and select most effective solutions under spatial and financial constraints. Given research investigates the UHI patterns in the context of Glasgow city (Scotland, UK) across three spatial scales, explores scale-dependent interactions between the UHI distribution and UGI, and, finally, evaluates the UHI mitigation potential of the Glasgow Avenues Programme, a city centre retrofitting strategy currently implemented by the Glasgow City Council. Based on microclimate simulations, the effectiveness of suggested greening schemes and alternative greening strategies of different UGI types, e.g., trees, grass and shrubs, green roofs, are analysed. The results show that, in Glasgow, the UHI phenomenon is most pronounced in summer and demonstrates a highly clustered pattern in the inner urban areas. At present state, on hot summer day pedestrians are likely to experience strong to extreme heat stress, which requires mitigation. UGI is a key factor of lowering surface temperatures in 75% of Glasgow city data zones, though UGI has more impact on urban heat at the larger scale, while at finer - cooling effect is weaker. Simulations demonstrate that greening scheme proposed by the Glasgow City Council Avenues Programme can mitigate local air temperatures by 0.91 K and improve pedestrian thermal comfort. Therefore, the Avenues Programme can be considered as an effective UHI mitigation case study and climate adaptation strategy. Once implemented on the full scale, the UGI can counterbalance the warming expected by 2050 due to the climate change. However, cooling effect of the Avenues Programme can be further maximized by strategical placement of trees and revision of the selected tree species. Findings of this study contribute to existing knowledge on UHI in temperate climate and provide empirical evidence on cooling potential of different UGI types that can be used to develop targeted, scale-specific cooling interventions, as well as to inform and refine current guidance to achieve urban climate adaptation goals.
Green infrastructure cooling strategies for urban heat island mitigation in cities : case study of Glasgow city centre
Ananyeva, Oksana (author)
2021-01-01
Miscellaneous
Electronic Resource
English
DDC:
710
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